I just had a bunch of bloodwork done by my new family doctor and my vitamin D levels are very low. We were discussing and he stated that long term progesterone use can cause lowering of your calcium and vitamin D levels. In all of my research, I never came across this.

When my levels were checked at a physical in 2004 (before starting this whole pregnancy/infertility crap) my levels were fine.

Just thought I'd pass it on. I was on and off the stuff for 4 years and I guess it added up.

Wow, that is very interesting!! Just this past year i also was told that I have very low Vit D levels and started on supplements. Thanks for sharing this ChristyMarie!

After 5 failed IUI's & 6 failed IVF's we threw in the towel w/ ART and then got a NATURAL miracle BFP! Hoping and praying it is finally our take home baby! Mother to our twins boys in heaven -lost at 22.5wks on 6/20/09 and 1 other little angel in heaven.